Brass Mounted Cooke Triplet Lens
- Made:
- circa 1900 in Leicester
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Brass mounted Cooke Triplet lens. With an H.D. Taylor patent, Series 111, F.6.5, 7.57 inch, f.l with a ring iris diaphragm. Optical system consists of three single separate lenses separated by air spaces, two convex with a concave lens between them. Acgromatise the whole systems. Spherical aberration and coma were corrected by suitable choice of lenses and astigmatism was corrected by placing the sdtop near to the centre lens. Distortion was absent and centre definition was good. Taylor Hobson, c.1900
Details
- Category:
- Photographic Technology
- Collection:
- Arthur Frank Collection
- Object Number:
- 1979-559/1160
- Materials:
- brass (copper, zinc alloy)
- Measurements:
-
overall: 50 mm x 50 mm x 42 mm,
- type:
- lens
- credit:
- The Arthur Frank Collection
